During fieldwork on the island of Yapen (Indonesia, Papua (Irian Jaya)), conducted in July 2006, several undescribed species of Odonata were collected. Two of these are described based on material from Yapen and Biak (Papua (Irian Jaya), Indonesia): Teinobasis sjupp spec. nov. (type locality: Yapen Island) and Macromia holthuisi spec. nov. (type locality: Biak Island).